They can be used in portable air tool , electric tool , drill presses, lathes, boring mill ,milling machines and other machines .

The HSS Teeth of our Bi-metal hole saw set refer to the High speed steel of M3,M42 for different application demands . They are recommended for cutting steel and cast iron pipe, steel plates, aluminum, copper, brass, stainless steel, wood and plastic. Furnished in standard size as listed and in handy assortments.

1. M3/M42 HSS Bi-metal edge welded to alloy steel back for heavy duty cutting;2. Cutting safely and efficiently, the best way to cut large holes, clearing the chips in touch materials;3. Cutting depth to 1-3/8''(35mm); 1~1/2''(38mm); 1~3/4''(44mm)and 1~27/32''(47mm);4. Diamters from 9/16''(14mm)_9~27/32''(250mm);5. Can be used in portable electric or pneumatic tools, vertical drill machines, lathe, Boring/Milling, Machines and Other Machine Tools;6.4/6TPI variable teeth;4/6 sharp aggerssive teeth;6 TPIConstant teeth7.Cuts Through stainless steel and other materials pipe, Nail-embedded wood,hard wood floors,plywood and plastic.8. All the specifications for arbored hole saws are the same as hole saws. There is an extra charge for the pilaots on the arbored hole saws.